On a recent episode of Saturday Night Live when the comedian Louis C.K. played host, one skit parodied his eponymous show on F/X. It riffed on the theme song and the discursive style of his comedy.

But here's the thing: Fewer than 2 million people watch Louie. About 7 million watch Saturday Night Live. That means even optimistically, at least two-thirds of the audience is missing the joke.

Decades ago, Saturday Night Live skewered topics most people in the country knew about: Mister Rogers, Dirty Dancing, who shot J.R.? Back then, the show drew more than twice as many viewers. These days, when we have what feels like a billion channels instead of a mere handful, it's difficult to share the same set of cultural references.

That's not to say some shows don't expertly make them, says NPR's pop culture blogger Linda Holmes, who maintains the Monkey See blog. She points to The Simpsons, of course, and to the NBC sitcom Community.

"They've made episodes referencing Law and Order," she notes. "And they've made episodes referencing My Dinner With Andre" — namely, a 1981 film about two guys chatting in a restaurant.

"And the thing about the My Dinner With Andre episode was," she says, "even if you didn't know what it was, you could pretty quickly learn what it was."

Holmes cites an axiom of television comedy writing: the 2 percent rule. The idea is that certain jokes and references will be understood only by 2 percent of the audience.

"The good part about it is that 2 percent of your audience feels really special and bonded to you," she says. "The downside is nobody likes to feel like they're not cool, [like] this show is trying to impress itself and its fans with how insider-y it is."

Still, some shows make outsiders want to be insiders. Many Americans have had exactly that experience watching British TV.

"I watched The Young Ones and Absolutely Fabulous," comedian Julie Klausner says. "And I didn't know who Felicity Kendal was, but she was a punch line in so many Young Ones episodes." (Kendal is a British actress famous mainly in her home country.)

This experience of not being in the club, of missing cultural references, is not unlike that of being an immigrant, says writer Junot Diaz. He tried to recreate that experience in his Pulitzer Prize-winning book, The Brief Wondrous Life of Oscar Wao. It's a slurry of comic-book references, science-fiction allusions and Dominican-American slang.

"The experience that most of us have in the world is, we tend to live in a world where a good portion of what we hear, see and experience is unintelligible to us," he told WHYY's Fresh Air. "And that, to me, feels more real than if everything was transparent for every reader."

That experience of feeling culturally dislocated can come just from flipping channels in your living room, observes Auburn University professor Susana Morris. She writes about subjects such as reality television for the website The Crunk Feminist Collective.

"It seems like you need a degree in reality TV to keep up with popular culture references," she jokes. "There's a show on TLC now about people trying on bras."

Morris says the VH1 reality show Love & Hip Hop: Atlanta was one of the most-discussed shows last year in social media. It's popular nationally even though it's all about regional specificity, particularly the Atlanta hip-hop scene.

"So there's this artist, Rasheeda," Morris says. "If you're outside Atlanta, you might not understand why she's on the show or what she has to do with anything."

And it's not just music or TV. There are video-game references — even references to their consoles, says Kirk Hamilton, who writes about gaming culture. He mentions the Dreamcast, a failed console released more than 10 years ago.

"There are comics all about the Dreamcast and its cool controller," he says. "And there's so many references you can make about the Dreamcast. It's really a cultural touchstone."

Hamilton admits our cultural common language has dissolved into dialects. These days, says Monkey See's Holmes, you can make a cultural reference without even having experienced what you're referring to.

"Cultural references can end up working as culturally created ideas that everyone agrees means the same thing," she says, giving the example of Jodie Foster mentioning the 7-year-old star of the reality show Here Comes Honey Boo Boo during her recent speech at the Golden Globes.

"I doubt she watches Honey Boo Boo," Holmes says. "And I doubt most of the people she's addressing watch Honey Boo Boo. But there is a kind of cultural understanding that this is what it means to see the decline of your civilization."

All this presents a challenge to comedians like Klausner, who's thoughtful about what references her audience will get.

"I assume everyone has seen Fargo," she says. "I assume everyone knows what I'm talking about when I mention Kerri Strug."

In case you don't know, Strug won a gymnastics gold at the 1996 Olympics. (I had to look that up.) Klauser's philosophy is to be generally inclusive when it comes to cultural references, to bring heart to her storytelling that will carry along even those who don't get every single reference she makes.

"I want to use what I know," she says. "And hopefully, take people along whether they know the original thing or not."

There's a wrong way, too, Klausner says. And that's making references just to show off and establish your superiority.

"And I am talking about that kind of Dennis Miller-y like machine-gun style: reference, reference, reference," she says.

You've got to love a cultural reference in a critique of cultural references.

But Morris says they've always worked as reminders of who belongs and who's just visiting. For example, if you ever see a stage show by Tyler Perry, there's often a moment where Perry uses a musical cultural reference to gather in his mostly black audience.

"They're singing a song, and it might be a gospel song or it might be an R&B song," she says. "And then there's a spotlight on the audience, and this is a moment for the inside crowd."

It's a moment when everyone in the audience who knows the song is encouraged to sign along. As Morris says, this is a moment that not everybody gets. But it's a moment when a cultural reference does exactly what it's supposed to do — connect to something larger, whether you get it or not.

Copyright 2013 NPR. To see more, visit http://www.npr.org/.

Transcript

DAVID GREENE, HOST:

For decades, the cast of "Saturday Night Live" took aim at things many Americans knew about. Think Mr. Rogers, "Dirty Dancing," who shot J.R. It was a time when there were only four TV networks - no YouTube, no streaming, no Internet. NPR's Neda Ulaby has this look at what cultural references mean in a media world that's so fractured.

NEDA ULABY, BYLINE: This season, "Saturday Night Live" aired a skit making fun of the show "Louie," on FX.

(SOUNDBITE OF SONG IN "SATURDAY NIGHT LIVE" SKIT)

ULABY: If you don't get what's funny about that, don't worry. Louie attracts fewer than 2 million viewers. About 7 million watch "Saturday Night Live." That means at least two-thirds of the audience is missing the joke. Shrunken audience syndrome means we don't share the same set of references anymore. That's not to say some shows don't expertly make them.

(SOUNDBITE OF SINGING IN TV SHOW, "THE SIMPSONS")

ULABY: These Simpsons can reference "The Wizard of Oz" and then boom, "Citizen Kane."

DANI PUDI: (As Abed) It's just a movie about two guys talking at a restaurant.

HOLMES: And the thing about the "My Dinner with Andre" episode was, even if you didn't know what it was, you could pretty quickly learn what it was, and so you could get close enough.

(SOUNDBITE OF TV SHOW, "COMMUNITY")

PUDI: (As Abed) Listen to how we talk to each other. We're like robots exchanging catchphrases and references.

ULABY: There's something in television writing called the 2 percent rule. Holmes says the way it works is, TV writers understand that some of their jokes and references will only be understood by 2 percent of the audiences.

HOLMES: The good part about it is that the 2 percent of your audience feels really special, and feels bonded to you. The downside is nobody likes to feel like they're not cool. This show is trying to impress itself and its fans with how insidery it is.

ULABY: There's a way, though, to make outsiders want to be insiders. So many Americans have had that experience watching British TV, including comedian Julie Klausner.

JULIE KLAUSNER: I watched "The Young Ones" and "Absolutely Fabulous." And I didn't know who Felicity Kendal was, but she was a punchline in so many "Young Ones" episodes.

(SOUNDBITE OF TV SHOW, "THE YOUNG ONES")

UNIDENTIFIED ACTOR: (As character) Oh, Felicity Kendal's underwear!

(AUDIENCE LAUGHTER)

KLAUSNER: And then later, when I found out who she was, it was immensely satisfying.

ULABY: Felicity Kendal is a British actress. There's no reason to know who she is unless you're British, or desperate to get in on the joke. This experience of not being in the club, of missing cultural references, is a lot like being an immigrant, says writer Junot Diaz. He talked to WHYY's FRESH AIR about trying to re-create that experience in his Pulitzer Prize-winning book, "The Brief Wondrous Life of Oscar Wao." It's a slurry of comic book references, science fiction references, and Dominican immigrant slang.

(SOUNDBITE OF ARCHIVED BROADCAST)

JUNOT DIAZ: The experience that most of us have in the world, is that we tend to live in a world where a good portion of what we hear, see and experience is unintelligible to us. And that, to me, feels more real than if everything was transparent for every reader.

ULABY: You can have that experience of feeling culturally dislocated just by flipping channels in your living room, says Professor Susana Morris.

SUSANNA MORRIS: I frequently write about reality TV, and it seems like you need to have a degree in reality TV to really keep up with popular culture references. There is a show on TLC now, where it's just about people trying on bras.

(SOUNDBITE OF TV SHOW THEME MUSIC)

ULABY: Another reality show, "Love & Hip Hop Atlanta," was one of the most-discussed show last year on social media. And it's popular nationally even though, Morris says...

MORRIS: There's regional specificity that, if you're not into the Atlanta hip-hop scene, you would definitely not get. So there's this artist, Rashida. If you're outside of Atlanta, you may not understand why she's on the show, or what she has to do with anything.

(SOUNDBITE OF TV SHOW, "LOVE AND HIP HOP ATLANTA")

RASHIDA: I went, and I talked to Deb from Mizay, who had Nicki Minaj. She knows the industry, and she knows...

ULABY: Missing any of these music or TV references? How about video games?

(SOUNDBITE OF VIDEO GAME MUSIC)

ULABY: Kirk Hamilton writes about gaming culture. And he has to work to keep up with references not just to games, but even the consoles they're played on - like the Dreamcast, a failed console released over 10 years ago.

KIRK HAMILTON: There are comics all about the Dreamcast and its cool controller. And there's so many references you can make about the Dreamcast, it's really a cultural touchstone.

ULABY: For a specific subgroup. Hamilton admits our cultural common language has split into dialects. These days, you can make a cultural reference without even having experienced what you're referring to. NPR's pop culture blogger, Linda Holmes, says cultural references can end up working as new, culturally created ideas.

HOLMES: That everyone agrees means the same thing. An example would be Jodie Foster getting up at the Golden Globes, and talking about privacy and saying...

(SOUNDBITE OF GOLDEN GLOBES BROADCAST)

JODIE FOSTER: I am not Honey Boo Boo Child.

HOLMES: I doubt she watches "Honey Boo Boo." She wouldn't show up in the audience. And I doubt most of the people she's addressing watch "Honey Boo Boo."

ULABY: And for the majority of people who don't watch "Honey Boo Boo," that is the show about a rambunctious Southern family showing off their 7-year-old in child beauty pageants.

HOLMES: There is a kind of cultural understanding that this is now what it means to see the decline of your civilization.

ULABY: All this presents a challenge to comedians like Julie Klausner, who's thoughtful about what references her audience will get.

KLAUSNER: I assume everybody's seen "Fargo." I assume everyone knows what I'm talking about when I mention - I don't know, Kerri Strug.

ULABY: She's a gymnast. I had to look that up. Klauser's philosophy, when it comes to cultural references in her comedy, is to be generally inclusive; to bring heart to her storytelling that will carry along even those who don't get every single reference she makes.

KLAUSNER: I want to use what I know and hopefully, take people along whether or not they know the original thing, or not.

ULABY: The wrong way to use references, she says, is just doing it to show off and establish your superiority.